I am in the process of repairing/rebuilding a 70HP 1978 3Cyl Merc, Should I spraypaint the inside of the covers to protect against corrosion using a heatproof engine enamel. It will be used in a salt water environment only. Would painting the inside of the water jackets impede cooling capability or cause any problems?? <br />Currently it is an almost new engine block with no corrosion, Like to keep it that way if possible. 
<br /><br />Also I have removed the reverse lock from the leg completely, Do I need to plug anything where the reverse lock actuator rod came from before I reassemble the leg.
<br /><br />Also I have removed the reverse lock from the leg completely, Do I need to plug anything where the reverse lock actuator rod came from before I reassemble the leg.